Reuben haworth



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HAWORTH, OF SOUTH NEW MARKET, NEW HAMPSHIRE.

Letters Patent No. 68,504, dated September 3, 1867,.

IMPROVED GENTRING-TOOL.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, REUBEN HAwoR of South New Market, in New Hampshire, have invented a new and improved Oentring-Tool; a ing is a full, clear, and exact description thereof, which will enable those skilled i same, reference being had to the accompanying drawings, forming This invention relates to a new and improved method of centring shafting andotherarticles in the process is attached to the lathe, which spindle holds leeve which supports a centring-cup, which The drawing represents a longitudinal central section of the tool and the manner'of their combination.

Similar letters of reference indicate corresponding parts. v

A represents the spindle, which is attached to the lathe by a'chuck or in any other suitable manner, and which, of course, revolves with it. B is the sleeve which surrounds the spindle, and which is held to it by the action of a spiral spring and the shoulder, seen at a. C is the centring-cup, by a screw-thread, as seen atd. D is the centring-drill, andE is the spiral spring. The spiral spring is placed in a chamber formed by the cup 0, as represented in the drawing, and the spindle A and against the cup C with a constant pressure.

In operating with this tool, the end of the shaft or article to be c forces back the cup and sleeve on the spindle, and brings the end of the drill, which, as it revolves, finds the centre of the article and dri When the shaft is removed the spring throws the cup forward again in the end of the spindle in the usual manner, spindle to suit difi'erent kinds of work.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent- The spindle A, the sleeve B, the cup C, the spring E, and the drill D; and operating substantially as herein shown and described, for the purp constructed, arranged, combined, oses set forth.

. REUBEN HAWORTH. Witnesses:

JOHN E. SIMPSON, JOHN W. TowLE 

